Merge branch 'for-linus' of git://git.kernel.org/pub/scm/linux/kernel/git/mingo/linux-2.6-sched-devel

* 'for-linus' of git://git.kernel.org/pub/scm/linux/kernel/git/mingo/linux-2.6-sched-devel:
  sched: add arch_update_cpu_topology hook.
  sched: add exported arch_reinit_sched_domains() to header file.
  sched: remove double unlikely from schedule()
  sched: cleanup old and rarely used 'debug' features.

4 files changed, 12 insertions, 22 deletions

diff --git a/include/linux/sched.h b/include/linux/sched.h
index 3625fcaf5d0f..fed07d03364e 100644
--- a/include/linux/sched.h
+++ b/include/linux/sched.h
@@ -790,6 +790,7 @@ struct sched_domain {
 };
 
 extern void partition_sched_domains(int ndoms_new, cpumask_t *doms_new);
+extern int arch_reinit_sched_domains(void);
 
 #endif  /* CONFIG_SMP */
 
diff --git a/include/linux/topology.h b/include/linux/topology.h
index 2d8dac8799cf..bd14f8b30f09 100644
--- a/include/linux/topology.h
+++ b/include/linux/topology.h
@@ -50,6 +50,8 @@
         for_each_online_node(node)                                              \
                 if (nr_cpus_node(node))
 
+void arch_update_cpu_topology(void);
+
 /* Conform to ACPI 2.0 SLIT distance definitions */
 #define LOCAL_DISTANCE          10
 #define REMOTE_DISTANCE         20
diff --git a/kernel/sched.c b/kernel/sched.c
index 3f7c5eb254e2..28c73f07efb2 100644
--- a/kernel/sched.c
+++ b/kernel/sched.c
@@ -594,18 +594,14 @@ enum {
         SCHED_FEAT_NEW_FAIR_SLEEPERS    = 1,
         SCHED_FEAT_WAKEUP_PREEMPT       = 2,
         SCHED_FEAT_START_DEBIT          = 4,
-        SCHED_FEAT_TREE_AVG             = 8,
-        SCHED_FEAT_APPROX_AVG           = 16,
-        SCHED_FEAT_HRTICK               = 32,
-        SCHED_FEAT_DOUBLE_TICK          = 64,
+        SCHED_FEAT_HRTICK               = 8,
+        SCHED_FEAT_DOUBLE_TICK          = 16,
 };
 
 const_debug unsigned int sysctl_sched_features =
                 SCHED_FEAT_NEW_FAIR_SLEEPERS    * 1 |
                 SCHED_FEAT_WAKEUP_PREEMPT       * 1 |
                 SCHED_FEAT_START_DEBIT          * 1 |
-                SCHED_FEAT_TREE_AVG             * 0 |
-                SCHED_FEAT_APPROX_AVG           * 0 |
                 SCHED_FEAT_HRTICK               * 1 |
                 SCHED_FEAT_DOUBLE_TICK          * 0;
 
@@ -3886,7 +3882,7 @@ need_resched_nonpreemptible:
 
         if (prev->state && !(preempt_count() & PREEMPT_ACTIVE)) {
                 if (unlikely((prev->state & TASK_INTERRUPTIBLE) &&
-                                unlikely(signal_pending(prev)))) {
+                                signal_pending(prev))) {
                         prev->state = TASK_RUNNING;
                 } else {
                         deactivate_task(rq, prev, 1);
@@ -6811,6 +6807,10 @@ static int ndoms_cur;		/* number of sched domains in 'doms_cur' */
  */
 static cpumask_t fallback_doms;
 
+void __attribute__((weak)) arch_update_cpu_topology(void)
+{
+}
+
 /*
  * Set up scheduler domains and groups. Callers must hold the hotplug lock.
  * For now this just excludes isolated cpus, but could be used to
@@ -6820,6 +6820,7 @@ static int arch_init_sched_domains(const cpumask_t *cpu_map)
 {
         int err;
 
+        arch_update_cpu_topology();
         ndoms_cur = 1;
         doms_cur = kmalloc(sizeof(cpumask_t), GFP_KERNEL);
         if (!doms_cur)
@@ -6924,7 +6925,7 @@ match2:
 }
 
 #if defined(CONFIG_SCHED_MC) || defined(CONFIG_SCHED_SMT)
-static int arch_reinit_sched_domains(void)
+int arch_reinit_sched_domains(void)
 {
         int err;
 
diff --git a/kernel/sched_fair.c b/kernel/sched_fair.c
index b85cac4b5e25..86a93376282c 100644
--- a/kernel/sched_fair.c
+++ b/kernel/sched_fair.c
@@ -302,11 +302,6 @@ static u64 __sched_vslice(unsigned long rq_weight, unsigned long nr_running)
         return vslice;
 }
 
-static u64 sched_vslice(struct cfs_rq *cfs_rq)
-{
-        return __sched_vslice(cfs_rq->load.weight, cfs_rq->nr_running);
-}
-
 static u64 sched_vslice_add(struct cfs_rq *cfs_rq, struct sched_entity *se)
 {
         return __sched_vslice(cfs_rq->load.weight + se->load.weight,
@@ -504,15 +499,6 @@ place_entity(struct cfs_rq *cfs_rq, struct sched_entity *se, int initial)
         } else
                 vruntime = cfs_rq->min_vruntime;
 
-        if (sched_feat(TREE_AVG)) {
-                struct sched_entity *last = __pick_last_entity(cfs_rq);
-                if (last) {
-                        vruntime += last->vruntime;
-                        vruntime >>= 1;
-                }
-        } else if (sched_feat(APPROX_AVG) && cfs_rq->nr_running)
-                vruntime += sched_vslice(cfs_rq)/2;
-
         /*
          * The 'current' period is already promised to the current tasks,
          * however the extra weight of the new task will slow them down a